Why do we seek improvement?

I have been wondering something for awhile. I am wondering why people seek improvement in there daily lives while all other animals seem to be content with just eating sleeping and breeding. Why is it that we humans find a need to do something out of the ordinary? Why do we seek to improve are houses are cars and everything else we have. Why don't we enjoy the simple things of life a little more. I feel like everyone just wants a bigger this and a bigger that. To be honest I also want fancy cars and houses and clothes but sometimes it just feels a little empty. I think what I truly want is to feel joy and to good things for the people around me. It is interesting how something is more fun when you share it with somebody else. All I am trying to say is there is something out there in this world worth reaching for. It might not be fancy cars but it is out there. It might be so far away in another galaxy that we will never reach it but that special something is what we are all looking for. Far far away,